EP 0300820 A3 19891129 - OPTICAL HEAD
Title (en)
OPTICAL HEAD
Publication
Application
Priority
JP 11401287 U 19870724
Abstract (en)
[origin: EP0300820A2] In an optical head of an optical recording and reproducing device for optically recording or reproducing informations, when a holder (3), which is provided with an optical element fixedly disposed thereon, is fixed to a housing member (1), the holder (3) is housed in a guide hole (2) of the housing member (1) and then a screw (4) is screwed into a tapped hole (5) formed in the housing member (1) not so as to reach the guide hole (2) to press a bottom portion of the tapped hole against the holder (3). Accordingly, with the optical head according to the present invention, a torque of rotation generated when the screw (4) is rotated is absorbed in the bottom portion of the tapped hole (5), so that the holder (3) is not moved when the screw (4) is screwed into the tapped hole (5), whereby the optical element fixedly disposed on the holder (3) can be easily positioned at an appointed position.
IPC 1-7
IPC 8 full level
G11B 7/08 (2006.01)
CPC (source: EP US)
G11B 7/08 (2013.01 - EP US)
Citation (search report)
- [A] FR 2469853 A1 19810522 - NIPPON TELEGRAPH & TELEPHONE [JP]
- [A] PATENT ABSTRACTS OF JAPAN
- PATENT ABSTRACTS OF JAPAN
- PATENT ABSTRACTS OF JAPAN
- PATENT ABSTRACTS OF JAPAN
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0300820 A2 19890125; EP 0300820 A3 19891129; EP 0300820 B1 19920429; CA 1314985 C 19930323; DE 3870531 D1 19920604; JP 2518213 Y2 19961127; JP S6418423 U 19890130; US 4861139 A 19890829
DOCDB simple family (application)
EP 88306774 A 19880722; CA 572803 A 19880722; DE 3870531 T 19880722; JP 11401287 U 19870724; US 22276488 A 19880722